Question 1

Identify the compound that would have the highest osmotic pressure when dissolved in water.

Accepted Answer

A)  NaCl
B)  K2SO4
C)  MgCl2
D)  FeCl3
E)  MgSO4F) A) and B)
G) All of the above

Question 2

Determine the partial pressure of oxygen necessary to form an aqueous solution that is 4.1 × 10-4 M O2 at 25°C.The Henry's law constant for oxygen in water at 25°C is 1.3 × 10-3 M/atm.

Accepted Answer

A)  1.9 atm
B)  0.53 atm
C)  0.24 atm
D)  0.77 atm
E)  0.32 atmF) C) and D)
G) B) and C)

Question 3

Commercial grade HCl solutions are typically 39.0% (by mass) HCl in water.Determine the molarity of the HCl,if the solution has a density of 1.20 g/mL.

Accepted Answer

A)  7.79 M
B)  10.7 M
C)  12.8 M
D)  9.35 M
E)  13.9 MF) A) and D)
G) D) and E)

Question 4

A solution is prepared by dissolving 98.6 g of NaCl in enough water to form 875 mL of solution.Calculate the mass % of the solution if the density of the solution is 1.06 g/mL.

Accepted Answer

A)  11.3%
B)  12.7%
C)  9.4%
D)  10.6%
E)  11.9%F) B) and C)
G) B) and E)

Question 5

Explain why the van't Hoff factor for MgCl2 is less than it's predicted value.

Accepted Answer

The hydrated Mg²^⁺ and Cl^⁻ ions ca...

Question 6

Which of the following statements is true?

Accepted Answer

A)  In general,the solubility of a solid in water decreases with increasing temperature.
B)  In general,the solubility of a gas in water decreases with increasing temperature.
C)  The solubility of a gas in water usually increases with decreasing pressure.
D)  The solubility of an ionic solid in water decreases with increasing temperature.
E)  None of the above statements are true.F) A) and E)
G) B) and C)

Question 7

At a given temperature the vapor pressures of benzene and toluene are 183 mm Hg and 59.2 mm Hg,respectively.Calculate the total vapor pressure over a solution of benzene and toluene with Xbenzene = 0.580.

Accepted Answer

A)  106 mm Hg
B)  121 mm Hg
C)  131 mm Hg
D)  242 mm HgE) C) and D)
F) B) and C)

Question 8

Which aqueous solution has the highest freezing point?

Accepted Answer

A)  0.10 m AlCl3
B)  0.10 m NaCl
C)  0.10 m BaCl2
D)  0.10 m C6H12O6E) None of the above
F) B) and C)

Question 9

Which of the following should have the largest Henry's law constant (kH) in water?

Accepted Answer

A)  Ne
B)  CO
C)  Br2
D)  CH3CH3
E)  CO2F) A) and B)
G) A) and E)

Question 10

A solution is prepared by dissolving 7.00 g of glycerin (C3H8O3) in 201 g of ethanol (C2H5OH) .The freezing point of the solution is ________°C.The freezing point of pure ethanol is -114.6°C at 1 atm.The molal-freezing-point-depression constant (Kf) for ethanol is 1.99°C/m.The molar masses of glycerin and of ethanol are 92.1 g/mol and 46.1 g/mol,respectively.

Accepted Answer

A)  -121.3
B)  0.752
C)  -107.9
D)  -113.8
E)  -115.4F) B) and D)
G) C) and E)

Question 11

A solution containing less than the equilibrium amount of solvent is called ________.

Accepted Answer

A)  an unsaturated solution
B)  a solute
C)  a supersaturated solution
D)  a saturated solution.
E)  a solventF) All of the above
G) C) and D)

Question 12

What is the mole fraction of oxygen in a gas mixture that is 37% oxygen and 63% nitrogen by volume?

Accepted Answer

A)  0.34
B)  0.37
C)  0.25
D)  0.52E) A) and B)
F) A) and C)

Question 13

Calculate the mole fraction of CaI2 in an aqueous solution prepared by dissolving 0.400 moles of CaI2 in 850.0 g of water.

Accepted Answer

A)  0.00841
B)  0.0270
C)  0.00900
D)  0.0252
E)  0.0167F) B) and D)
G) C) and E)

Question 14

Choose the aqueous solution that has the highest boiling point.These are all solutions of nonvolatile solutes and you should assume ideal van't Hoff factors where applicable.

Accepted Answer

A)  0.100 m NaNO3
B)  0.100 m Li2SO4
C)  0.200 m C3H8O3
D)  0.060 m Na3PO4
E)  They all have the same boiling point.F) All of the above
G) A) and E)

Question 15

Calculate the freezing point of a solution of 500.0 g of ethylene glycol (C2H6O2) dissolved in 500.0 g of water.Kf = 1.86°C/m and Kb = 0.512°C/m.

Accepted Answer

A)  30.0°C
B)  -30.0°C
C)  8.32°C
D)  -8.32°C
E)  70.2°CF) A) and C)
G) A) and E)

Question 16

Which of the following concentration units are temperature dependent?

Accepted Answer

A)  mole fraction
B)  molality
C)  mass percent
D)  molarity
E)  none of the aboveF) All of the above
G) None of the above

Question 17

Calculate the boiling point of a solution of 500.0 g of ethylene glycol (C2H6O2) dissolved in 500.0 g of water.Kf = 1.86°C/m and Kb = 0.512°C/m.Use 100°C as the boiling point of water.

Accepted Answer

A)  108°C
B)  92°C
C)  130°C
D)  70°C
E)  8.3°CF) A) and B)
G) B) and C)

Question 18

Determine the solubility of N2 in water exposed to air at 25°C if the atmospheric pressure is 1.2 atm.Assume that the mole fraction of nitrogen is 0.78 in air and the Henry's law constant for nitrogen in water at this temperature is 6.1 × 10-4 M/atm.

Accepted Answer

A)  1.5 × 10-4 M
B)  6.5 × 10-4 M
C)  5.7 × 10-4 M
D)  1.8 × 10-4 M
E)  3.6 × 10-4 MF) C) and E)
G) B) and D)

Question 19

Calculate the freezing point of a solution of 40.0 g methyl salicylate,C7H6O2,dissolved in 800.g of benzene,C6H6.Kf for benzene is 5.10°C/m and the freezing point is 5.50°C for benzene.

Accepted Answer

A)  -2.09°C
B)  2.09°C
C)  3.41°C
D)  7.59°CE) A) and D)
F) B) and D)

Question 20

Which of the following ions should have the most exothermic ΔHhydration?

Accepted Answer

A)  Na⁺
B)  Mg2⁺
C)  Al3⁺
D)  Ca2⁺
E)  Sr2⁺F) B) and E)
G) D) and E)

Exam 12: Solutions

What is the mole fraction of oxygen in a gas mixture that is 37% oxygen and 63% nitrogen by volume?

Correct Answer
verified

Which of the following concentration units are temperature dependent?

Correct Answer
verified

Which aqueous solution has the highest freezing point?

Correct Answer
verified

Identify the compound that would have the highest osmotic pressure when dissolved in water.

Correct Answer
verified

Calculate the freezing point of a solution of 500.0 g of ethylene glycol (C₂H₆O₂) dissolved in 500.0 g of water.K_f = 1.86°C/m and K_b = 0.512°C/m.

Correct Answer
verified

Determine the partial pressure of oxygen necessary to form an aqueous solution that is 4.1 × 10^-4M O₂ at 25°C.The Henry's law constant for oxygen in water at 25°C is 1.3 × 10^-3 M/atm.

Correct Answer
verified

A solution is prepared by dissolving 98.6 g of NaCl in enough water to form 875 mL of solution.Calculate the mass % of the solution if the density of the solution is 1.06 g/mL.

Correct Answer
verified

A solution containing less than the equilibrium amount of solvent is called ________.

Correct Answer
verified

Commercial grade HCl solutions are typically 39.0% (by mass) HCl in water.Determine the molarity of the HCl,if the solution has a density of 1.20 g/mL.

Correct Answer
verified

Explain why the van't Hoff factor for MgCl₂ is less than it's predicted value.

Correct Answer
verified
The hydrated Mg²^⁺ and Cl^⁻ ions ca...
View Answer

Which of the following statements is true?

Correct Answer
verified

Determine the solubility of N₂ in water exposed to air at 25°C if the atmospheric pressure is 1.2 atm.Assume that the mole fraction of nitrogen is 0.78 in air and the Henry's law constant for nitrogen in water at this temperature is 6.1 × 10^-4 M/atm.

Correct Answer
verified

Calculate the boiling point of a solution of 500.0 g of ethylene glycol (C₂H₆O₂) dissolved in 500.0 g of water.K_f = 1.86°C/m and K_b = 0.512°C/m.Use 100°C as the boiling point of water.

Correct Answer
verified

Which of the following ions should have the most exothermic ΔH_hydration?

Correct Answer
verified

Calculate the freezing point of a solution of 40.0 g methyl salicylate,C₇H₆O₂,dissolved in 800.g of benzene,C₆H₆.K_f for benzene is 5.10°C/m and the freezing point is 5.50°C for benzene.

Correct Answer
verified

Correct Answer
verified

At a given temperature the vapor pressures of benzene and toluene are 183 mm Hg and 59.2 mm Hg,respectively.Calculate the total vapor pressure over a solution of benzene and toluene with X_benzene = 0.580.

Correct Answer
verified

Which of the following should have the largest Henry's law constant (k_H) in water?

Correct Answer
verified

Choose the aqueous solution that has the highest boiling point.These are all solutions of nonvolatile solutes and you should assume ideal van't Hoff factors where applicable.

Correct Answer
verified

Calculate the mole fraction of CaI₂ in an aqueous solution prepared by dissolving 0.400 moles of CaI₂ in 850.0 g of water.

Correct Answer
verified

Exam 12: Solutions

What is the mole fraction of oxygen in a gas mixture that is 37% oxygen and 63% nitrogen by volume?

Correct AnswerverifiedShow Answer

Which of the following concentration units are temperature dependent?

Correct AnswerverifiedShow Answer

Which aqueous solution has the highest freezing point?

Correct AnswerverifiedShow Answer

Identify the compound that would have the highest osmotic pressure when dissolved in water.

Correct AnswerverifiedShow Answer

Calculate the freezing point of a solution of 500.0 g of ethylene glycol (C2H6O2) dissolved in 500.0 g of water.Kf = 1.86°C/m and Kb = 0.512°C/m.

Correct AnswerverifiedShow Answer

Determine the partial pressure of oxygen necessary to form an aqueous solution that is 4.1 × 10-4 M O2 at 25°C.The Henry's law constant for oxygen in water at 25°C is 1.3 × 10-3 M/atm.

Correct AnswerverifiedShow Answer

A solution is prepared by dissolving 98.6 g of NaCl in enough water to form 875 mL of solution.Calculate the mass % of the solution if the density of the solution is 1.06 g/mL.

Correct AnswerverifiedShow Answer

A solution containing less than the equilibrium amount of solvent is called ________.

Correct AnswerverifiedShow Answer

Commercial grade HCl solutions are typically 39.0% (by mass) HCl in water.Determine the molarity of the HCl,if the solution has a density of 1.20 g/mL.

Correct AnswerverifiedShow Answer

Explain why the van't Hoff factor for MgCl2 is less than it's predicted value.

Correct AnswerverifiedThe hydrated Mg2⁺ and Cl⁻ ions ca...View AnswerShow Answer

Which of the following statements is true?

Correct AnswerverifiedShow Answer

Determine the solubility of N2 in water exposed to air at 25°C if the atmospheric pressure is 1.2 atm.Assume that the mole fraction of nitrogen is 0.78 in air and the Henry's law constant for nitrogen in water at this temperature is 6.1 × 10-4 M/atm.

Correct AnswerverifiedShow Answer

Calculate the boiling point of a solution of 500.0 g of ethylene glycol (C2H6O2) dissolved in 500.0 g of water.Kf = 1.86°C/m and Kb = 0.512°C/m.Use 100°C as the boiling point of water.

Correct AnswerverifiedShow Answer

Which of the following ions should have the most exothermic ΔHhydration?

Correct AnswerverifiedShow Answer

Calculate the freezing point of a solution of 40.0 g methyl salicylate,C7H6O2,dissolved in 800.g of benzene,C6H6.Kf for benzene is 5.10°C/m and the freezing point is 5.50°C for benzene.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

At a given temperature the vapor pressures of benzene and toluene are 183 mm Hg and 59.2 mm Hg,respectively.Calculate the total vapor pressure over a solution of benzene and toluene with Xbenzene = 0.580.

Correct AnswerverifiedShow Answer

Which of the following should have the largest Henry's law constant (kH) in water?

Correct AnswerverifiedShow Answer

Choose the aqueous solution that has the highest boiling point.These are all solutions of nonvolatile solutes and you should assume ideal van't Hoff factors where applicable.

Correct AnswerverifiedShow Answer

Calculate the mole fraction of CaI2 in an aqueous solution prepared by dissolving 0.400 moles of CaI2 in 850.0 g of water.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Calculate the freezing point of a solution of 500.0 g of ethylene glycol (C₂H₆O₂) dissolved in 500.0 g of water.K_f = 1.86°C/m and K_b = 0.512°C/m.

Correct Answer
verified

Determine the partial pressure of oxygen necessary to form an aqueous solution that is 4.1 × 10^-4M O₂ at 25°C.The Henry's law constant for oxygen in water at 25°C is 1.3 × 10^-3 M/atm.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Explain why the van't Hoff factor for MgCl₂ is less than it's predicted value.

Correct Answer
verified
The hydrated Mg²^⁺ and Cl^⁻ ions ca...
View Answer

Correct Answer
verified

Determine the solubility of N₂ in water exposed to air at 25°C if the atmospheric pressure is 1.2 atm.Assume that the mole fraction of nitrogen is 0.78 in air and the Henry's law constant for nitrogen in water at this temperature is 6.1 × 10^-4 M/atm.

Correct Answer
verified

Calculate the boiling point of a solution of 500.0 g of ethylene glycol (C₂H₆O₂) dissolved in 500.0 g of water.K_f = 1.86°C/m and K_b = 0.512°C/m.Use 100°C as the boiling point of water.

Correct Answer
verified

Which of the following ions should have the most exothermic ΔH_hydration?

Correct Answer
verified

Calculate the freezing point of a solution of 40.0 g methyl salicylate,C₇H₆O₂,dissolved in 800.g of benzene,C₆H₆.K_f for benzene is 5.10°C/m and the freezing point is 5.50°C for benzene.

Correct Answer
verified

Correct Answer
verified

At a given temperature the vapor pressures of benzene and toluene are 183 mm Hg and 59.2 mm Hg,respectively.Calculate the total vapor pressure over a solution of benzene and toluene with X_benzene = 0.580.

Correct Answer
verified

Which of the following should have the largest Henry's law constant (k_H) in water?

Correct Answer
verified

Correct Answer
verified

Calculate the mole fraction of CaI₂ in an aqueous solution prepared by dissolving 0.400 moles of CaI₂ in 850.0 g of water.

Correct Answer
verified